Metalworking machine



Aug? 13, e' c CGROTNES I 2 L009 METALWORKING MACHINE Filed April 25,1938 4 Sheets-Shet 1 Grpo/nes g- 13, c. c. Rb NEs 221L00 METALWORKINGMACHINE 7 Filed Apri1 25, 195a 4 Sheets-Sheet? womzys Aug. 13, 1940.

I C. C. GROTNIES MEI'ALWORKING'MACHINE :Fiied April 25,1938

4 Sheets-Sheet 4 NVELNTO Qd Carl C? Grofn c/l'rToragsysIIIIIIIIIIIIIIIIIIIIIIII object the prbvision' of a unitary machine fornot only edging the blank but also forminga Patented-Aug 13, 1940 UNITEDSTATES PATENT. OFFICE 15 Claims.

The invention relates to machines for shaping sheet metal articles such,for example, as cylindrical shells or blanks used in making pails,buckets and the like, and has for its principal bead therein all as partof a single operation.

A further object of the invention is to provide a combined roll edgingand beading machine for operating on cylindrical metal blanks in whichthe respective edging and beading dies are operated in timed relation toshape the blank expeditiously and economically.

Another object of the invention is to provide in a cylindrical blankshaping machine an improved transfer mechanismv for automaticallypresenting successive blanks to the shaping dies;

The invention also resides in various structural improvements in themechanism for stripping the go shaped blanks from the dies.

Further objects tion will become apparent from a consideration of thefollowing description taken in conjunction with the accompanyingdrawings in which:

Figure 1 is a perspective view of a metal working machine embodying theinvention.

Fig. 2 is a perspective view of one of the finished blanks after it hasbeen operated on by the machine in Fig. 1.

. Fig. 3 is an enlarged longitudinal sectional view 5 line 5-5 in Fig. 3illustratingparticularly the transfer mechanism with a series of workblanks v along the line 3 3 in Fig. 1.

Fig. 4 is a vertical sectional view along the line 4-4 in Fig. 3. I

Fig. 5 is a longitudinal sectional view along the in position thereon.

Figs. 6 and '7 are enlarged fragmentary front elevations of the die headwith the heading, die

in respectively contracted and expanded positions.

Fig. 8 is a detailedprespective view of one of the die blocks includedin the heading die.

Fig. 9 is a detailed transverse sectional View along the line 9-9 inFig. 3.

For purposes of illustrationof its various novel features, the inventionhas been. shown and described herein as embodied in a machine forforming a rolled edge l0 and annular bead ll 0 in cylindrical blanks l2(Fig. 2) such as are used in fabricating pails for paint and the like.It will be apparent to those skilled in the art, however, that theinvention is applicable in many of its aspects to machines for shapingother arti- 55 cles. In general, the particular machine illusandadvantages of the inventrated (Fig.1) embodies a bed l3 on which ismounted an axially reciprocable die breast or head ll carrying acircular roll edging die l5 and -an expansible beading die IS on itsforward end. Plain cylindrical sheet metal blanks are presented to thedies in axial alinement with the head therein. The beading die I6 isthen retracted I out of engagement'with the blank and the head l4returned to its initial position. The transfer mechanism II serves topresent successive blanks to the dies in timed relation with the'diehead movement so that the machine operates entirely automatically. 1 r

The edging die l5 (Figs. 4 and 6) has been shown in the form of aring-shaped plate bolted to the forward end of the diehead and providedwith an annular groove I9 which receives the forward edge of thecylindrical sheet metal blank l2. As the head. l4 advances to theposition shown in Fig. 4 the blank is forced against the stop l8 so thatthe forward edge of the blank is curled outwardly and back by thegroove. l9

as shown in Fig. 4, to form a suitably rolled reinforcing orstrengthening edge I0 on the blank. If the stop I8 is used simply asanabutment and guide it may have a plain flat surface. In the event,however, that it is desired to expand the outer edge of the blank inflange form to shape it for the connection of a bottom wall member asindicated at l0, a truncated cone-shaped projection 20 (Fig. 4). In suchcase the stop l8 and projection 20 serve as a second opposed edgingdieand the opposite ends of the blank are shaped simul-.

is provided on the face of the stop [8 ll in a circular 22 (Fig. 8) isprovided with radially extending grooves 23 in its opposite faces whichreceive complemental projections or guide ribs 24 (Fig. 7) on a circularretaining plate 25 and on the face of the ring-shaped edging die 15. Theretaining plate 25 is mounted in spaced relation to the front of theedging die l5 by series of through bolts 26 surrounded by spacingcollars 21. Retention of the segmental beading die blocks 22 in theirnormally retracted positions is effected by a circular helical "spring28 positioned in annular grooves 29 in the outer ends'of the blocks.When in its retracted condition the beading die is of suiiiciently smalldiameter that it may be moved freely into the interior of the blank.

For the purpose of forcing the beading die blocks 22 radially outwardinto engagement with the blanks, a cone-type actuator is employed. Forthis pu pose a cone 30 (Fig. 3) is secured to the outer end of anaxially reciprocable draw bar 3| slidably supported in a central bearingsleeve 32 bolted within an axial bore 33 in the head l4. To accommodatethe actuator the die l5 has a central opening Ii alined with acounterbore 33' in the face of the head l4. The conical surface of theactuator 30 has flattened bearing surfaces for engagement with the innerends of the repective die blocks 22 so that when the actuator is thrustoutwardly from the position shown in Fig. 4 to the position shown inFig. 3, the die blocks 22 are correspondingly moved outwardly from theirretracted positions (Fig. 6) to their radially or laterally projectedpositions (Fig. '7). I

The head l4 constitutes a reciprocatory slide upon which the twodies i5and II are mounted for movement axially of. the work. To form the rollededge and the bead, the two dies are operated in a predeterminedtimed'relation, the arrangement being such that as an incident to themovement of the die I 5 with the head to form the rolled edge, the dieII is positioned for subsequent radial expansiomby an independentmovement of the actuator 30 relative to the head to form the bead. Inthe present instance the head is of generally cylindrical contour and issupported for axial movement on the bed ll of the machine through themedium of axially extending side ribs 34 (Figs. 3 and 9) disposed inguideways so formed by the bed and by retaining plates ll.

These retaining plates are bolted to the sides of the bed and areprovided with flanges 3! overlying the ribs 34 on the head.

Timed sequential actuation of the dies and their supporting head iseflected by a driving mechanism which serves in general first to advancethe head i4 to the position shown in Fig. 4, in which the edging die I!engages the blank l2 and forms a rolled edge thereon, second, to expandthe heading die into engagement with the blank as shown in Fig. 3,third, retract the bead-= ing die toits initial position, and finally,retract both of the dies out of engagement with the blank and return thehead I 4 to its initial position. This power actuated mechanism includesa pair ofgears 31' (Fig. 3) iournaled in the bed ll'on shafts 3| andconnected by an eccentriccrank pin 38, the gears being driven by anelectric motor (not shown). Fixed on the outer faces of the gears 31areperipheral cams 4| engaged by cam iollower rollers 'journaled on headl4. The thrust exerted by these cams on the followers '4l ad vances thehead 14 from itsinitial position to its fully projected position (Fig.4). The cams are contoured so that a period 01' dwell follows inreciprocation oi the rack il.

which the head l4 remains stationary. During this dwell, the movement ofa pitman ,4! connected between the eccentric crank pin ll and the drawbar 3| projects the cone shaped actuator outwardly with respect to thehead sothat the heading die is thrust into engagement with the blank.Further movement of the pitman 42 during the dwell period retracts thedraw bar II to its initial position so that the actuator ll is again inthe position shown in Fig. 4 at the completion of the dwell. The spring28 thereupon contracts the beading die to its initial diameter.

In addition to their function in actuating the beading die 16, thecone-shaped actuator 30 and the associated driving connections alsoserve to positively retract the head l4. Thus, upon continued rotationof the gears 31 to their initial position, the head I4 is pulled to itsstarting position by the pitman 42 and draw bar 3i due to the engagementof the rear face of the actuator I} with a shoulder) 43 (Fig. 4) at thebottom-of the counterbore 33. It will be understood that if desired morethan one set of heading dies may transverse to the line of reciprocationof the die carryinghead l4, and for locating successive blanks inoperative alinement with the dies. In the construction illustrated aplurality of blanks II are advanced simultaneously by a series ofpushers 48-50 carried on a horizontally reciprocable rack ll. Thesepushers are tiltably mounted on the rack so that they can be depressedand slid under the blanks on the return stroke of the rack (to the leftas viewed in Fig. 5) and then raised into pushing engagement with theblanks (as shown in Fig. 5) on the opposite or advancing stroke of therack. A common drive mechanism. hereinafter described in greater detail,is utilized-for reciprocating the rack II and for tilting the pusher-s"-0-" so that the reciprocating and tilting motions of the-pusherswilloccur in timed relation. As shown, the rack is formed of spacedchannels I! (Fig. I) joined by webs I3 and Journaled on rollers 54secured to the machine bed I} by brackets i4.

Fresh blanks I! are rolled onto the transfer mechanism by a pair ofspaced stationary inclinedrunways 55 (Fig. 5) having notches II in theirupperv surfaces for receiving the blanks at sequential points in theirstep by step progress. The pushers 48-0-5! advance the blanks from onenotch tojhe next upon each To support a blank in operative alinementwith the head i4 the last pusher II in the series is notched out at tocradle and receive a blank forced against it by the next adjacent pusher4!. These two pushers 4! and it thus cooperate to hold the blank againstlateral displacement while it is being operated upon by the dies.

1 Movement of the blanks II transversely with I I4. These guide platespresentsmooth fiat surwork 58 surrounding the forward end of the headfaces spaced a distance from the abutment l8 substantially equal to thelength of the blanks.

being operated upon. To guide the blanks l2 into the space between theplates 51 and abutment l8 the leading edge 51* of the first of theplates 51 is bent out so that the blanks will slide transversely of therack 5| into proper position if they are located too close to the head"M as they move onto the machine. This guiding mechanism also includes ahorizontal guide bar 59 pivoted on the frame 58 at 60 and adapted toride over the tops of the blanks as they move into position in front ofthe head M. The-weight of the pivoted bar 59 forces the blanks downagainst their supporting pusher so that they will be accurately alinedwith the dies.

In order to coordinate the actuation of the transfer mechanism H withthat of the die head M,- they are preferably driven from the same primemover. In the machine shown a lever 6| lower ends to a rod 65 (Fig.' 5)slidable in the rack, the outer end of this rod being connected to theoscillating drive lever 6| through alink 56. The lost motion connectionof the rod 65 to the rack is formed by spaced collars EST-68 fast on therod 65 and engageable with the opposite faces of the transverse rack web53. The first part of the inward stroke of the rod"65 to the left (asviewed in Fig. 5) tilts the pushers 38-'-595ll downwardly and then theengagement of the collar 611 with the rack web 53 shifts the entire rackand pusher assembly inward during the remainder of the stroke. Since thepushers are thus depressed below the'level of the blanks 92 they passfreely under them during this inward stroke of rack and pusher assembly.Similarly, the first part of the outward stroke of the rod (to the rightas viewed in Fig. 5) tiltsthe pushers -'?l8- 35l5 upward again and thenthe engagement of the other collar 68 with the rack web 53 shifts therack and pusher assembly outwardly to its initial position. During thisoutward stroke the .raised pushers' engage. the

, blanks and move each of the series one step forward. In this mannerthe blanks are positively advanced step by step to operative engagementwith the dies 3-45, and upon completion of the die forming operation thefinished blanks are pushed from the machine by thelast pusher 50. Inorder to prevent premature movement of the rack 5| a friction plate 69(Fig. 1 is preferably secured to one of'the channels 52-to en-' gage.the rollers 5d when the rack 52 is in its extreme inward position (tothe left as viewed in Fig. 1) so that only a positive pull by the collar68 on the rack web 53 will dislodge thejammed plate 69 and permit therack 5i to move out wardly.

Stripping of the finished blanks ig from the dies I5-i'6 is accomplishedby the horizontal guide bar 59. This guide bar rides on the top of theblank between the rolled edge l0 and bead ll so that when the die headIt is retracted the stationary bar 59 will engage the bead I l andthereby strip the blank from the dies in the event that the blank tendsto adhere to the die l5. Accordingly the finished blank is readilyejected from the machine by the next pushing stroke of the pusher 50.

The guide mechanism may also be utilized to strip the shaped blank fromthe flange forming projection 20 on the abutment III in the event thatsuch a'forming abutment is used. For this purpose the guide supportingframe 58 is carried by a pair of bars I0 journaled for horizontalsliding movement in lugs ll projecting from the bed side plates 35(Fig.1). Adjustable collars I2 and 13 on the rods 10 are engageable bylug H on the side of the head M which projects through a slot 15in oneof the side plates 35. With the collars l2 and 13 positioned as shown inFig, 1, the guide frame 58 will, of course, remain stationary while thehead is reciprocated. When' it is desired to use the guide mechanism tostrip theblanks from the stop Hi, the collar 13 is moved along the rodI0 away from the adjacent projection H and made fast to the rod in thisadjusted position. Then the return or retractive stroke of the head l4will cause the lug 74 to engage the collar 73 so that the entire guideframe58 will be retracted during the final portion of the head returnstroke.

This retractive movement ofthe guide frame causes the horizontal guidebar 59 to engage the rolled edge I!) formed on the forward end of thefinished blank and thereby pull the blank-free of the projection 20 onthe abutment l8. Similarly, on the next advancing stroke of the head l4the lug M engages the other collar 12 so as to return the guide frame toits normal working position for engagement wlththe next blank presentedto the machine.

Although a particular embodiment of the invention has been shown anddescribed in some detail for purposes of illustration, there is nointention to thereby limit the invention to such preferred embodimentbut, on the other hand, the appended claims are intended to cover allmodifications within the spirit and scope of the invention.

'I claiin as my invention:

1. In ,a machine of the character described,

means for supporting a cylindrical metal shell, a

- die head reciprocable toward and away from said support axlallyj of ashell thereon, a roll edging die and a beading die carried by said head,a first power actuated means for advancing said head toward said supportto engage the blank by said edging die with a period of dwell at the endof said advance movement, and a second power 4 actuated means operablein timed relation with the first for moving said beading die into andout of engagement with the blank during said period of dwell and forthereafter returning said head to its initial position.

2. In a machine of the character described,

means for supporting a cylindrical metal shell, a

die head reciprocable toward and away from said support axiallyof ashell thereon, a ring shaped roll edging die carried on the front'faceof said head, a radially expansible beading die disposed on said headforwardly and centrally of said edging die; a first power actuated meansfor advancing said head toward, said support to engage the blank by saidedging die with a period of dwell at the end of said advance movement,and a second power actuated means operable in. timed relation with thefirst for expanding the inserted beading die into engagement with theblank and contracting the same again during said period of dwell and forthereafter returning said head to its initial position.

' 3. In a' machine of the character described, means for supporting acylindrical metal shell, 8. die head, means for effecting relativetraversing movement between said head and support axially of a shellthereon, an edging die on said head en gageable with the adjacent edgeof the shell, said support including an abutment at the end of the shellopposite said head and cooperable with the latter to clamp the shelltherebetween, a beading die also carried by said head and positionedforwardly of said edging die within the shell when said edging die ispositioned in engagement wth the shell, and means for actuating saidbeading die laterally into engagement with the shell in' timed relationwith the relative movement between said head and support and after theshell is clamped by said head and support.

4. In a machine of the character described means for supporting acylindrical metal blank,

' a die head traversable toward and away from said support axially ofthe blank and having a bore therein alined with the axis of the blank,said supporting means including an abutment bearing against the end ofthe blank opposite said head, a ring shaped edging die on the forwardend of said head encircling the end of said bore, and engageable withthe blank to clamp the same against said abutment, an expansible beadingdie on the forward end of said head and imertable into the blank, anactuator for said expansible beading die projecting through said bore,and power actuated means for moving said head and actuator in timedrelation.

5. In a machine of the character described, means for supporting 'acylindrical metal blank, a die head traversable. toward and away fromsaid support axially of the blank and having a bore therein alined withthe axis of the blank, a ring shaped edging. die on theforward end ofsaid head encircling the end of said bore, an expan-' sible beading diein the forward end of said h'ead and insertable into the blank,actuating means for said beading die including an axially 'slidable drawbar in said bore, means including a rotatable cam for advancing saidhead toward said support with a period of dwell at the end of theadvance, means for projecting said draw bar forwardly of said head toexpand said beading die 'and for returning said draw bar through a fullreturn stroke equal to the advance of said head, means on said headengageable by said bar to efiect a withdrawal of said head by the returnstroke of said draw'bar, and common power actuated means for drivingboth said head advancing means and draw bar.

6. In a machine of the character described, means for supporting acylindrical metal shell and including an abutment engageable with ofieend of the shell; an edging die; a beading die;

and power actuated means for simultaneously advancing said dies to aposition in which said edging die engages the shell and the other doesnot, retaining said edging die. in such position for to their initialpositions, said edging die being eil'ective in said first named positionto clamp the shell aganst said abutment.

- 7. In a machine for roll-edging and beading a cylindrical shell} thecombination of a roll-edgin die, a bead forming die adapted to beinserted ing abutment and for simultaneously efiecting relative movementbetween said beading die and shell to position said beading die adjacentthe shell, means operative in timed relation with said first named meansto move the inserted beading die into engagement with the shell uponcompletion of the edging operation, and means for simultaneouslyeffecting a disengaging movement between both of said dies and theshell.

8. In a machine for roll-edging and beading a cylindrical shell, thecombination of a roll-edging die, an expansible bead forming die adaptedto be inserted into the shell, a clamping abutment 7 arranged in opposedspaced relation to said rolledging die means for effecting relativemovement between said edging die and shell axially of the shell to bringsaid edging die into operative engagement therewith to not only edge theshell but also to clamp the same in position against said clampingabutment and for simultaneously eil'ecting relative movement betweensaid beading die and shell to insert said beading die within the shell,and means operative in timed relation with a into the shell while saidfirst named dies are in engagement with the :shell and thereby holdingit against movement, and a second power actuated means operable in timedrelation to the first for moving said beading die into and out ofengagement with the shell.

10. In a machine of the character described the combination of means forsupporting a cylindrical metal shell, 9. head mounted for reciprocationtoward and away from said support axially of a shell tliereon, a beadingdie on the forwa'rd end of said head insertable into the shell to form abead therein intermediate its ends, and means including a horizontalguide member resting on the shell when positioned on said supportingmeans for engaging the bead formed therein to strip the shell from saidbeading die upon the withdrawal of said head and for guiding successiveshells into position on said support. 11. In amachine of the characterdescribed, a transfer mechanism for presenting successive cylindricalmetal blanks to a die mechanism or the like comprising an inclinedrunway for su porting a series of cylindrical blanks. for rollingmovement toward said beading means with the blanks disposed in parallelrelation, said nmway havingnotches therein for receiving nd holding theblanks in successive positions a step-bystep advance thereof, areciprocatablerack extending along said runway beneath the surfacethere-- of, a plurality-of pushers tiltably mounted on said rack,actuator means for tilting said pushers alternately above and below thesurface of said runway to bring the same alternately into and out ofpushing position with respect to the-blanks, u

and means for reciprocating said rack in timed relation with the tiltingof said pushers.

'12. In a machine of the character described,

a transfer mechanism for presenting successive cylindrical metal blanksto a die mechanism or the like comprising, means for supporting a seriesof cylindrical blanks disposed in parallel relation,

a reciprocatable rack extending beneath said last named meanstransversely to said blanks, a plurality of pushers tiltably mounted onsaid ra'ck, actuator means for tilting said pushers alternately upwardinto engagement with the blanks and downward out of engagement therewithto,

tion with the tilting of said-pushers.

13. In a machine of the character des'cribed,-a transfer mechanism forpresenting successive cylindrical metal blanks to a die mechanism or thelike comprising, meansfor supporting a se-e -ries of cylindrical blanksdisposed in parallelrelation, a reciprocatable rack extending beneathsaid last named means transversely to the blanks, and a plurality ofpushers movably mounted on said rack and adapted to project upwardlyfrom said rack and operatively engage the blanks during the forwardmovement of the rack and to be;

tilted downwardly out of the path 0! said blanks during the backwardmovement oi said rack, at

least one of said pushers having a recess formed in the rear sidethereof adapted to cradle a blank pressed against the same by the nextadjacent pusher, to thereby position such blank with respect to the diemechanism or the like.

14-. In a machine or the character described, means for supporting acylindrical metal shell, a die support, a roll edging die and a headingdie carriedby said die support, a first power actuated means ior'eii'ecting a relative advancing movement between'said supports axiallyof a blank carried by the support to engage the blank by said edging diewith a period of dwell 'at the end of said advance movement, and asecond power actuated means operable in timed relation with the firstfor moving said beading die into and out of engagement with the blankduring said period of dwell and for thereafter eflecting relativemovement between said supports to return the same to their initialpositions. I 15. In a machine of the character described, 20 thecombination of a fixed die for shaping the edge of a cylindrical metalshell, a reciprocable head for pushing a shell into engagement with thedie, a stripper presenting an elongated edge extending transverselyacross the periphery of the shell intermediate the latters ends when theshell is in engagement with the die, and power actuated means forwithdrawing said head from shell-en gaging poation and sequentiallymoving said stripper endwise of the shell away ir-om said 3 die intoengagement with acurl on the opposite end 01. the shell to strip it fromthe are;

- p cam. cinemas

